57
Participants
Start Date
November 14, 2017
Primary Completion Date
April 23, 2018
Study Completion Date
December 1, 2018
Air cleaner use method 1
All interventions in the first cohort will start at noon on Tuesday or Thursday and continue to the next morning of Tuesday or Thursday.
Air cleaner use method 2
All interventions in the second cohort will start from the beginning to the end of smog episodes.
Department of Occupational & Environmental Health Sciences, School of Public Health, Peking University, Beijing
Peking University
OTHER